<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="app">
        去除空格<input type="text" v-model="msg">
        <h1>{{msg | filterA}}</h1>
    </div>
</body>
<script>
    Vue.filter('filterA',function(value){
        return value.split(' ').join('');
    })
    var vue = new Vue({
        el:'#app',
        data:{
            msg:''
        }
    })
</script>
</html>